ex2318.m

数字信号处理的MATLAB实现

%例23-18 图例
x=0:0.02*pi:2*pi;
y1=sin(x);
y2=cos(x);
y3=sin(3*x).*cos(x);
plot(x,[y1;y2;y3])
axis([0 2*pi -1.5 1.5])
set(gca,'XTick',[0 pi 2*pi],'XTickLabel',{'0','pi','2pi'})
legend('sin(x)','cos(x)','sin(3x)cos(x)')